Headers is not defined

[tenonin]

I tried to run the example code and give this error, but i don't know to fix

node index.js 
/mnt/c/Pitang/StableDiffusion/node_modules/replicate/index.js:189
const headers = new Headers();

ReferenceError: Headers is not defined
    at Replicate.request (/mnt/c/Pitang/StableDiffusion/node_modules/replicate/index.js:189:21)
    at Replicate.createPrediction (/mnt/c/Pitang/StableDiffusion/node_modules/replicate/lib/predictions.js:24:31)
    at Replicate.run (/mnt/c/Pitang/StableDiffusion/node_modules/replicate/index.js:116:45)
    at file:///mnt/c/Pitang/StableDiffusion/index.js:15:32
    at ModuleJob.run (node:internal/modules/esm/module_job:193:25)
    at async Promise.all (index 0)
    at async ESMLoader.import (node:internal/modules/esm/loader:533:24)
    at async loadESM (node:internal/process/esm_loader:91:5)
    at async handleMainPromise (node:internal/modules/run_main:65:12)```

[mattt]

@tenonin What version of Node.js are you running?

[tenonin]

it's v16.17.0

[mattt]

@tenonin Thanks for clarifying.

The Replicate client makes requests using fetch. By default, the globalThis.fetch function is used, which is available on Node.js 18 and later. From the README:

On earlier versions of Node.js and other environments where global fetch isn't available, you can install a fetch function from an external package like cross-fetch and pass it to the fetch option in the constructor.

import Replicate from "replicate";
import fetch from "cross-fetch";

const replicate = new Replicate({
  // get your token from https://replicate.com/account
  auth: process.env.REPLICATE_API_TOKEN,
  fetch: fetch,
});

[jasongrishkoff]

I've been encountering this same issue (on node 14). I pass fetch exactly as shown in the above comment, but it comes back saying Headers is not defined. I looked at the source code, and I do see it calls new Headers() here. I think that should maybe reference options.fetch if that was defined, as in this answer?

Rolling back to version 0.11.1 allowed me to run without any errors.